digestion
Post on 03-Jan-2016
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Presented by the Stomach (Primarily...)
Stores _____________ (human capacity is ____________) This is the site of early _____________ digestion “J”-shaped It does not absorb _________________
◦ The nutrients are still too large Only absorbs:
◦ Water◦ Glucose◦ Salts◦ Alcohol
These things will pass through the stomach membrane into the _____________________
This chemical and physical digestion changes the food bolus into a liquefied paste called _________________
___________________◦ Secretes ___________________ (HCl) for two
purposes HCl destroys ________________in food HCl converts ________________into pepsin
This enzyme digests proteins into amino acids
___________________◦ Secretes ___________________
___________________◦ Secretes ___________________
This protects the stomach lining so no __________occur
_______________________________◦ Regulates the movement of foods and stomach
acids from stomach to small intestines
Main function of the small intestines is to _______________ nutrients◦ The “small” in the small intestines refers to the
___________________, NOT the length◦ It is approximately ____ long in humans
Shorter in carnivores, longer in herbivores
There are three parts to the small intestine1. ________________________• It’s about 0.3m long• The majority of digestion occurs here
2. ________________________• It’s about 2.7m long
3. ________________________• It’s about 4 m long
Its secretions play a large role in digestion It secretes two products:
1. ___________________________________ This is released into the pancreatic duct It is a ____________solution, meaning that it will neutralize
the stomach acid pH becomes 9 (neut. HCl), deactivates pepsin
It also contains some digestive ___________________ Amylase (converts carbs to sugars) Lipase (converts lipids to fatty acids and glycerol) Trypsin (converts proteins to amino acids)
2. ___________________________________ This is release directly into the bloodstream It regulates _________________________ levels
____________________________________________ ____________________________________________
To maintain health, your body must keep certain conditions constant or within an acceptable range
Regulating blood-sugar levels is one example of this
While watching Bill Nye, please try to answer all the questions on the page
There are some on the back!!
Enjoy – I am still trying to download all of Magic School Bus
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